(e.g. yii\base\Component::trigger(). (available since version 2.0.12), // return the index value corresponding to $row, protected method The columns being selected. yii\db\QueryTrait::addOrderBy(). representing the sub-query, and the corresponding key representing the alias. There are many Magic Methods available like __get(), __set(), __clone(), __toString(), __invoke(), etc. The condition to be applied in the GROUP BY clause. for building query conditions based on filter values entered by users. Index::index() method will be executed as a class constructor! You can use get_class_methods() with either an $instance of a class or the 'ClassName' to get only public functions. The properties being copies are the ones to be used by query builders. (which means the column contains a DB expression). Sets $command cache, if this query has enabled caching. that's different. False is returned if the query //$ret = $db->insecureQuery("SELECT * FROM table_test WHERE t1=".$db->quote($t1)); 'dblib:host=your_hostname;dbname=your_db;charset=UTF-8'. ', protected method. The columns value to normalize. Asking for help, clarification, or responding to other answers. Add elements to an array before or after a specific index or key: /* array_push_before, key array, before index insert, /* array_push_before, key array, before key insert, /* array_push_after, key array, after index insert, /* array_push_after, key array, after key insert, Further Modification on the array_push_associative function. It can be either a string or an array. I wanted to count number of created statements and number of their executings. remove empty query operands. Anonymous functionsclosures callable Closure //Get the key lengths for each of the array elements. Sets the HAVING part of the query but ignores empty operands. Adds an additional HAVING condition to the existing one. This method represents the happening of an event. yii\base\BaseObject::className(). yii\base\Component::ensureBehaviors(). This is similar with using stream_copy_to_stream().. You can also specify the data parameter as a single dimension array. Returns a value indicating whether the query result contains any row of data. Is there a way to make trades similar/identical to a university endowment manager to copy them? Do not call this method directly as it is a PHP magic method that , We define 2 classes, CurrentValue and AddValue The method will automatically quote the table names unless it contains some parenthesis Use null or negative value to disable limit. , : Note that if you are selecting an expression like CONCAT(first_name, ' ', last_name), you should yii\db\QueryTrait::isEmpty(). yii\db\QueryTrait::andFilterWhere(). AND t2=? in a SELECT statement. If you're adding multiple values to an array in a loop, it's faster to use array_push than repeated [] = statements that I see all the time: "Adding 100k elements to array with []\n\n", "\n\nAdding 100k elements to array with array_push\n\n", "\n\nAdding 100k elements to array with [] 10 per iteration\n\n", "\n\nAdding 100k elements to array with array_push 10 per iteration\n\n". Behaviors can be attached using a name or anonymously. The SQL statement to be appended using UNION, TRUE if using UNION ALL and FALSE if using UNION. Note that mysqli_stmt_bind_param() requires parameters to be passed by reference, whereas call_user_func_array() can accept as a parameter a list of variables that can represent references or values. the following does not work: Human Language and Character Encoding Support, http://www.php.net/manual/en/function.call-user-func.php, http://www.php.net/manual/en/function.call-user-func-array.php. As an extension to onesimus's code below for finding inherited methods, in PHP 5 you can use the Reflection API to find which of these are overriden. func_num_args() The value is considered "empty", if one of the following conditions is satisfied: The first parameter specifies what type of join it is. Simply use the & the same way you would for a named functionright after the `function` keyword (and right before the nonexistent name). Zero or more parameters to be passed to the callback. As a result, this method is best suited Creates a new Query object and copies its property values from an existing one. Returns the maximum of the specified column values. The main difference is that this method will "id ASC, name DESC") or an array Please refer to where() Defined in: The following code shows the difference between this method and having(): Note that unlike having(), you cannot pass binding parameters to this method. We create an instance (avo) of the second class I wanted to extend PDO class to store statistics of DB usage, and I faced some problems. Looking for a way to push data into an associative array and frustrated to know that array_push() can't do the job ? Defined in: call_user_func_array (PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8) call_user_func_array For example, [':name' => 'Dan', ':age' => 31]. Anonymous functions Whether to append new event handler to the end of the existing See orderBy() and addOrderBy(). specifying the values to be bound to the query. I know this is a bit late, but no, that is not required. if you need to push a multidimensional numeric array into another, array push will push the hole array into a key of the first array, for example, let's imagine you have two arrays: // If you don't want that to happen here's a function to avoid that: //Using the same example from before this function will return: A function which mimics push() from perl, perl lets you push an array to an array: push(@array, @array2, @array3). Since version 2.0.7, an yii\db\ExpressionInterface object can be passed to specify the ORDER BY part explicitly in plain SQL. But the considerations from below still apply. Executes the query and returns all results as an array. To learn more, see our tips on writing great answers. Defined in: List of behaviors to be attached to the component. class This method is internally used to convert the data fetched from database Checks if a property is set, i.e. The columns (and the directions) to be ordered by. This array can be used in combination with PHPs call_user_func_array() to emulate CodeIgniters default behavior. ['id', 'name']). class A(object): def method1(self, a, b, c): # foo method = A.method1 method is now an actual function object. As a result, this method is best suited If I have several classes with functions that I need but want to store separately for organisation, can I extend a class to have both? (which means the column contains a DB expression). Does Python have a string 'contains' substring method? That is, the above example will blow up unless you decorate A.method1 with one of the two decorators discussed below, pass it an instance of A as the first argument or access the method on an instance of A. This is a PHP4 backwards-compatibility feature. Adds a filtering condition for a specific column and allow the user to choose a filter operator. Each behavior is indexed by its name and should be a yii\base\Behavior object, ['id', 'name']). The main difference is that this method will The new HAVING condition. If I have several classes with functions that I need but want to store separately for organisation, can I extend a class to have both? '"`\[]|{{) Defined in: If you use array_push() to add one element to the One init in order to give to the instance variable self.value an initial value Columns can be specified in either a string (e.g. You can use this simple function I created. See this example: It is important to note that get_class_methods($class) returns not only methods defined by $class but also the inherited methods. After this mode is enabled, methods, returning query results like yii\db\QueryInterface::one(), Note that mysqli_stmt_bind_param() requires parameters to be passed by reference, whereas call_user_func_array() can accept as a parameter a list of variables that can represent references or values. Human Language and Character Encoding Support, http://php.net/manual/en/language.operators.array.php, https://www.php.net/manual/en/function.array-key-last.php. For example, I am implementing Swoole HTTP Request event providing it a call-back as a Class with static member. These methods can be chained together. To read the top array element efficiently, use the 'current' function. The event instance. The type of join, such as INNER JOIN, LEFT JOIN. The join condition that should appear in the ON part. The value of the first column in the first row of the query result. python Returns a value indicating whether a property can be set. This method will check if any attached behavior has Can be either a string, an array or a stream resource.. file_put_contents PHP4 does this anyway - now it will happen regardless of the PHP version being used. As someone pointed out the array_push() function returns the count of the array not the key of the new element. // attempt to find method in parent class, // check whether method is explicitly defined in this class, // if so, then it is overriden, so add to array. The database connection used to generate the SQL statement. method_exists (which means the table is given as a sub-query or DB expression). The main difference is that this method will yii\db\QueryTrait::filterWhere(). Additional option that should be appended to the 'SELECT' keyword. //Sort the array by string length so the longest strings are replaced first. kanboard 'It was Ben that found it' v 'It was clear that Ben found it', Earliest sci-fi film or program where an actor plays themself. PHP supports various forms of meta-programming through mechanisms like the Reflection API and Magic Methods. List of behaviors attached to this component. Magic Methods Note: . Push one or more elements onto the end of array. Note that in the same way that the name of the self variable is entirely up to you, so is the name of the cls variable but those are the customary values. <<PHP: PDO - Manual The problem was that I didn't knew how PDO creates PDOStatement (constructor parameters and so on), so I have created these two classes: It seems MySQL doesn't support scrollable cursors. When the tables are specified as an array, you may also use the array keys as the table aliases Defined in: This is used to construct the UNION clause(s) in a SQL statement. The conditions that should be put in the WHERE part. (available since version 2.0.8), public method Do not call this method directly as it is a PHP magic method that will be implicitly called when an unknown method is being invoked. Appends a SQL statement using UNION operator. yii\base\Component::attachBehaviors(). That private/protected methods are seen as callable when tested publicly. Returns a value indicating whether there is any handler attached to the named event. PHP 7.1 Thus another workaround for the mentioned problem is to use in_array(, get_class_methods()). the order-by columns. of one join which has the following structure: List of query parameter values indexed by parameter placeholders. Since version 2.0.7, an yii\db\ExpressionInterface object can be passed to specify the GROUP BY part explicitly in plain SQL. yii\db\QueryInterface::all(), yii\db\QueryInterface::exists() and so on, will return empty or false values. // will never do anything: $myInstance will ALWAYS be null inside this closure. The only thing that is needed is that the autoloader finds the searched class (or any other autoloadable piece of code) from the files it goes through and the whole file will be included to the runtime. tcolorbox newtcblisting "! Defined in: Any time spent on activity that happens outside the execution of the script such as system calls using system(), stream operations, database queries, etc. yii\base\Component::off(). given configuration. The join condition that should appear in the ON part. The default number of seconds that query results can remain valid in cache. update: Just saw the reference to call_user_func_array in your post. Custom Post Types in WordPress Defined in: PHP callable . Make sure you properly quote column names in the expression. Manual yii\base\Component::detachBehaviors(). "%s: Cannot perform push on something that isn't an array! This method is similar to andHaving(). However, this was a bug (#29210) in early versions of PHP 5 and was fixed (according to the changelog) in PHP 5.0.5 (and/or PHP 5.1.0). Whether to select distinct rows of data only. The COUNT expression. We create an instance (cvo) of the first class Please refer to where() on how to specify this parameter. Catch multiple exceptions in one line (except block), How to iterate over rows in a DataFrame in Pandas, Math papers where the only issue is that someone else could've done it but didn't. Parameters. Sort of a little "trap" for people who have in-depth experience with the OO terminology :-). remove empty query operands. Anonymous functionsclosures callable Closure So unfortunately PDO::CURSOR_SCROLL wont work. Maximum number of records to be returned. method_exists() - Checks if the class method exists; is_callable() - Verify that a value can be called as a function from the current scope. (available since version 2.0.14). (available since version 2.0.35), https://github.com/yiisoft/yii2/blob/master/framework/db/Query.php, https://www.php.net/manual/en/function.isset.php, https://www.php.net/manual/en/function.unset.php. Note, that if select() has not been specified before, you should include * explicitly In this case, the corresponding array key will be used For more details, see our step-by-step guide on how to install a WordPress plugin. Returns the fully qualified name of this class. yii\base\Component::hasProperty(). For example, ['user', 'post']. set_time_limit This provides for great event handlers, accumulators, etc., etc. Otherwise shoot feet, // Determine what class is responsible for making the call to Closure, // Added to class: function __toString(){ return 'this'; }. I was wondering if caching the the methods in an array would have a faster lookup. handler list. Defined in: Use 0 to indicate that the cached data will never expire. The condition with empty operands removed. (in this case, property name is case-insensitive); the class has a member variable with the specified name (when, an attached behavior has a readable property of the given name (when. Do not call this method directly as it is a PHP magic method that @VarunMaurya, Python uses duck typing, so classes aren't checked. The cache dependency associated with the cached result. If you do, and there is no __construct() method in the same class, then your e.g. You may also specify the table as an array with one element, using the array key as the table alias This can cause serious problems when trying to write code that dynamically calls a class method, and that works in both PHP4 and PHP5. that's different. Therefore when streaming a mime typed object from the database you cannot use fpassthru. for building query conditions based on filter values entered by users. yii\base\Component::detachBehavior(). "id, name") or an array (e.g. The columns to be selected. Anonymous functions Note that the parameters for call_user_func() are not passed by reference. This function is case-insensitive (as is PHP) and here is the proof: Just to mention it: both method_exists() and is_callable() return true for inherited methods: Note that prepending the namespace (if any) is required even if the calling class is in the same namespace: if you want to check for a method "inside" of a class use: Note that in PHP5, method_exists() will sucessfully find *private* methods. Returns the query result as a scalar value. handler list. array_push() array array array value1 ERN; 'To use Expression in from() method, pass it in array format with alias. Calls the named method which is not a class method. The limit. Has the same effect as: Note: This method is called by yii\db\QueryBuilder when it starts to build SQL from a query object. Notes. See select() for more (available since version 2.0.35), public method, 'Unsetting an unknown or read-only property: ', "CONCAT(first_name, ' ', last_name) AS full_name", public method // in_array() can only handle being given an array. This method is similar to where(). The conditions that should be put in the WHERE part. array. :['"`\[]|{{) the group-by columns. We define 3 methods in the first class Static methods in other languages don't necessarily map to a class method in Python. Checks if the class method exists in the given If this parameter is not given (or null), the db application component will be used. 'user u'). The parameters (name => value) to be bound to the query, Defined in: Columns can be specified in either a string (e.g. If the query results in nothing, an empty array will be returned. indexed by behavior names. This method is invoked at the end of the constructor after the object is initialized with the configuration. underlying database engine and to support integer values higher than a 32bit PHP integer can handle. Tip As with anything that outputs its result directly to the browser, the output-control functions can be used to capture the output of this function, and save it in a string (for example). Whether there is any handler attached to the event. Every instance of a lambda has own instance of static variables. let him try and learn the basics in the process. Watch out when 'importing' variables to a closure's scope -- it's easy to miss / forget that they are actually being *copied* into the closure's scope, rather than just being made available. Detaches all behaviors from the component. This is used to construct the GROUP BY clause in a SQL statement. autoloaders if the class is not already known. Beware that since PHP 5.4 registering a Closure as an object property that has been instantiated in the same object scope will create a circular reference which prevents immediate object destruction: One way to call a anonymous function recursively is to use the USE keyword and pass a reference to the function itself: Some comparisons of PHP and JavaScript closures. I wanted to count number of created statements and number of their executings. This function mimics that behaviour. We define one method in the second class List of behaviors attached to this component. // The function uses the reflection class that is built into PHP!!! Note that the array format of where() is designed to match columns to values instead of columns to columns, so The $condition parameter should be either a string (e.g. that you can call directly (functions are first class objects in python just like in PHP > 5.3) . will be implicitly called when executing unset($component->property). Some coworkers are committing to work overtime for a 1% bonus. has been defined for the given object_or_class, false It removes all behaviors because they are attached to the old object. (which means the table is given as a sub-query or DB expression). Prepends a SQL statement using WITH syntax. Here is what I want to happen: update: Just saw the reference to call_user_func_array in your post. The condition is added in the same way as in andFilterWhere() so empty values are ignored. Defined in: Short story about skydiving while on a time dilation drug. The result may be a string depending on the . ArrayObject All public, private and protected properties of objects will be returned in the output unless the object implements a __debugInfo() method. Visibility for building query conditions based on filter values entered by users. The method requires a $condition parameter, and optionally a $params parameter ArrayObject::append Appends the value; ArrayObject::asort Sort the entries by value; ArrayObject::__construct Construct a new array object; ArrayObject::count Get the number of public properties in the ArrayObject; ArrayObject::exchangeArray Exchange the array for another one; ArrayObject::getArrayCopy This is a PHP4 backwards-compatibility feature. for building query conditions based on filter values entered by users. Anonymous functions. a string specifying the behavior class, or an configuration array for creating the behavior. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. array, it's better to use $array[] = because in that Why is proving something is NP-complete useful, and where can I use it? If A had already inherited from somewhere else (say "Red"), would I need to include the base class inside A? // string(27) "anonymous function 'member'". call_user_func The data to write. Both aliases and names are enclosed into {{ and }}. Please refer to join() on how to specify this parameter. If you want to check in a class itself if a method is known you may do so with magic variable __CLASS__. Zero or more parameters to be passed to the callback. Calls the named method which is not a class method. Returns a list of behaviors that this component should behave as. $this (available since version 2.0.21), // Already in the normalized format, good for them, // Using "columnName as alias" or "columnName alias" syntax, // Normal column name, just alias it to itself to ensure it's not selected twice, // Either a string calling a function, DB expression, or sub-query. Amongst other things, this means that in base class methods, any use of the "self" keyword will refer to that base class regardless of the actual (derived) class on which the method was invoked. Making statements based on opinion; back them up with references or personal experience. You can call a function from within a class with: In Python function are first class citezens, so you can just assign it to a property like any other value. Both method_exists() and is_callable() return private and protected functions, which, as mentioned below, causes problems for PHP5/OO programming. Returns a value indicating whether a method is defined. It will strip out the inherited methods. object_or_class. Returns a value indicating whether a property is defined for this component. stack, and pushes the passed variables onto the end of As mentioned before, is_callable and method_exists report all methods callable even if they are private/protected and thus actually not callable. Defined in: In particular, it recognizes the following operators if they appear as the leading characters in the given value: The column value optionally prepended with the comparison operator. The new condition and the existing one will be joined using the AND operator. method is now an actual function object. | use mysqli_stmt::bind_param (if a table does not need alias, do not use a string key). including class-level handlers. yii\db\QueryTrait::normalizeOrderBy(). call_user_func_array So PDOStatement should have link to PDO that created it and stores the statistical info. Using this function will use any registered The dependency to be associated with the cached query result for this query. anonymous function) that returns the index value based on the given Columns can be prefixed with table names (e.g. rev2022.11.3.43004. // Use array_map() and strtolower() to make all values returned by get_class_methods() lowercase. as a Query instance representing the sub-query. How to group the query results. A prepared query instance which will be used by yii\db\QueryBuilder to build the SQL. Index::index() method will be executed as a class constructor! See also https://www.php.net/manual/en/function.unset.php. yii\base\Component::__isset(). Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. details about the format of this parameter. Not the answer you're looking for? Note: . To insert a value into a non-associative array, I find this simple function does the trick: I found a simple way to have an "array_push_array" function, without the references problem when we want to use call_user_func_array(), hope this help : This will work to solve the associative array issues: A very good function to remove a element from array. that you can call directly (functions are first class objects in python just like in PHP > 5.3) . ", When developing a pocketmine plugin, a good way to add stuff to a YAML table is. Class members declared public can be accessed everywhere. yii\db\QueryTrait::emulateExecution(). This is used to construct the WITH section in a SQL query. Returns table names used in from() indexed by aliases. for building query conditions based on filter values entered by users. If not set, the "db" application component will be used. Attaches a list of behaviors to the component. Defined in: As it was the latter function i required i wrote this very simple replacement. For example, ['company', 'department']. The callable to be called.. args. Now that you know how to do it, I would seriously think about if you want to do it. The return value of this method should be an array of behavior objects or configurations This differed from the I did a performance check, and I saw, if you push more than one value it can be faster the array push, that the normal $array[] version. yii\base\BaseObject::init(). ie. \s* //UPDATE users SET name = 'foobear' WHERE id = 1001. Defined in: Columns can be specified in either a string (e.g.